[FEAT] Follow XDG directory specifications for enabling devtools

[SolarBakha]

📝 Provide a description of the new feature

Currently spicetify ignores the XDG_CACHE_HOME env var and hardcodes looking in ~/.cache

cli/src/cmd/devtools.go

Line 40 in 7bd6df4

filePath = homePath + "/.cache/spotify/offline.bnk"

Preferably, it'd use the XDG var first and use ~/.cache as a fallback

➕ Additional Information

No response

[rxri]

Important to know - does spotify use XDG_CACHE_HOME?

[SolarBakha]

Using spotify from the AUR, yes it does use XDG_CACHE_HOME

[rxri]

okay. will change it in next update